Drill sharpener



Nov. 8, 1932.

' G. c. PEARSON DRILL SHARPENER Filed Aug. 6, 1950 3 Sheets-Sheet l @Why dttozmq NOV. 8, 1932. G, PEARSON 1,887,038

DRILL SHARPENER Filed Aug. e, 1930 :s sheets-sheet' 2 'zffay C @W10/0.

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' Clbkozmsf Nov. 8, 1932.

cf PEARsoN 1,887,038

DRILL SHARPENER Filed Aug. 6, 1950 3 Sheets-Sheet 5 ing the dies when fullyopen.

Patented Nov. 8,` 1932` lUNVI'ED STATES yPxAfrilslxr'l-OFFICE 1 n Gtrs'rav C. PEARSOLLOF nENvnr't, COLORADO, AssIGNoRvtro GARDNER-DENVER COM- e. PANY,1OF DENVER, COLORADO, A CORPORATION OF nnLAwARn DRILL SHARPENER Application filedy August 6, 198.0. f serial no. 478,437.

, The Object of the present invention is toV provide novel, simple and effective means for cleansing scale and like accumulations from; thedies of metal forging machines, more phar-V ticularly drill Sharpeners, said means taking the cleansing uid from thedie operatingV motor Aand being so constructed that" 1t will not interfere with the effective .action `of such motor. p Y tis VIn the accompanying drawings: n Figure 1 is a front elevation of a rock drill Sharpener equipped with the cleansing mechanism. y y

Figure 2 is a top plan view` ofthe same, withportions broken away in order to show the cleansing fluid directing means. n y Figure 3 is a sectional view onthe line 3-3 of Figure'2.

Figure 4 is a vertical sectional view show- Figure 5 .is` a similar s view: thefdies closed.` n

1 Figure 6 is a detail horizontal sectionalview on an enlarged scaleand on the line but showing` 5,2? 64,6 of Figure 4. f

In jtlie embodiment disclosed a suitable base is employed upon which is `positioneda fluid actuated motor,` the same comprising a cylinder member 7 -having a lowerv pistonk chamber Sand an upper piston chamber '9.V A head 10, secured on the base, closes the upper end of the pistonV 9, and is secured to the: cylindermember lby bolts k11.` s

y This head 10 constitutes a carrier or'holder for iiXedfdies. Thus in the presentembodi-- ment tliereis a central die 12, and as lshown in Figure 1, other dies 13 are located on opposite sides of the die 12. Cooperating lwith thehead 10- is an upperk vertically movable die carrier 14 carrying acentraldie l15 that' cooperates with the die 12, and also carrying n side kdies 16 that cooperatewith the dies 13. The upper die carrier 14 is connected by piston rods or bolts 17k with a piston 18fhaving portions 19 yand 2O respectively operating in thev piston chambers. ,f8 and 9.--

Actuating iuid for the pistons 1s supplled from any suitable source to a coupling nipple 21 formedupon thejsidek of the cylinder 7 and f5@ communicating-with yar passageway l 22 that r- 22 and thepassageways 26 and 27 is coneXtends to a valve chest 23 formed on theop p'osite side ofthe cylinder member 7. This passageway 22 is incommunication with a cylinder 24, in which is a piston 25 that operates in Opposition to the piston 13, and is adapted Ito elevate thesame. From the valve chest 23 passageways26 and 27 lead to kthe piston chambers 9and 8 respectively. Communication between the supply passagewayy l trolled by a suitable valve 28 in the valve chest. It` is believed to be unnecessary to go mto `detailregarding'this .valve as its struc-A tureand operation is well known. The valve is connectedV to a suitable operating handle 6a 29 at one side of the cylinder 7. -It will be evident,.ho.wever, thatwlien the valve is op` erated to openl the passageways 26 and 27 to the/'supply"passageway 22 motive iiuid lwill enter the piston chambers 9 and Sandinove the piston 18 ,downwardly against theaction ofthe piston 25. On the other hand when' the supply kto the chambers 8 andy 9 is cut off and said chambers are open to the exhaust, then thepiston 25 will elevate the piston 18.v As a consequence the yupper die carrier 14 and its dies k15 and 16 `are raised and lowered, and whenl in lowered position, cooperate withfthelower dies 12.and 13.`

The present inventionrelates to a means for cleansing the dies, of ,scale and like materialswhich accumulate in the lower or stationary dies particularly. lTo this end the head 10 is vertically bored at one ormore places as shownat- 30, and in these bores are located vertically'l sliding stems 31 that are interposed between the upper piston 2O and theupperdie .member or carriery 14, abutting lows: When the die membersare Open,-or as 1P.

shown in Figure 4, the lower ports 33 will be in the head 10. If now motive fluid, such as air, is turned into the passageway 26, the piston 18 is forced downwardly, thereby correspondingly moving downwardly the head 14. The stems 3l are also moved downwardly and as they do the ports 33 will enter the piston chamber in which the fluid under pressure is located before the upper ports 33 enter the head l0. There is consequently an escape of fluid through the passageway 32 and upper ports 33, these latter being downwardly inclined. Jets of air are blown over the surface of the head 10-and the dies mounted thereon, so that the scale which has been deposited in these dies and on the head isV blown away. As the ports continue their downward movement, the upper ports 33 will enter the head l0 and the escape of the fluid from the piston chamber 9 is stopped. Consequently full force of the motive fluid in the piston chamber is acting on the piston when the dies are in their clamping or cooperating relation. Y l

From the foregoing, it is thought that the construction, operation,v and many advantages of the herein described invention willV be apparent to those skilled in the art without further description and it will be understood that various changes in the size, shape,

' proportion and minor details ofV construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention. i

What I claim, is

l. In met-al working apparatus, the combination with a cylinder member having an upper head and a piston operating in the cylinder member, of a fixed die overlying the cylinder member, a movable die overlyingy the fixed die and movable toward and from the same, a piston rod connection between theV piston and movable die, and a stem interposed between the piston andmovable die for movement therewith and havingl a` passageway that opens into the cylinder member or receiving fluid therefrom, saidJ passageway directing fluid against one of the. dies to clean the same.

2. In metal working apparatus, the combination with a cylinder member having a piston` chamber and an upper-head and a piston operating in the cylinder member, of a fixed die overlying the cylinder member, a movable die overlying the fixed die and movable toward and from the same, a piston rod connection between the piston and movable die, and a stem interposed between the Y Y piston and movable die for movement therewithV and having a passageway provided with a port movable into and out of the piston chamber and into and out of the head, said passageway having an outlet portthat opens between the dies and directs fluid thereagainst to-clean` the dies.

3. In a metal working apparatus, the combination with relatively movable die members, of a fluid operated motor connected thereto for moving the same, and means independent of the motor and its connection with the die members, but movable therewith, for directing fluid from the motor to the dies to clean the latter.

4. In a metal working apparatus, the combination with a fixed die member and a movable ydie member co-operating therewith, of a motor for moving the movable die member, including a cylinder and a piston operating in the cylinder andattached through suitable connections to the movable die member, and means' independent of the motor and its connection with the movable die member, but movable therewith, for delivering cleansing fluid from the cylinder to the dies.

5. In a metal working apparatus, the combination with a fixed die member and a movable die member co-operating therewith, of a motor for moving the movable die member, including a cylinder and a piston operating in the cylinder and attached through suitable connections to the movable die member, means independent of the motor and its connection with the movable die member, but movable therewith, for conducting cleansing fluid from the cylinder to the dies, and said means being movable to functioning positions during the initial-movement of the movable die member.

6. In a metal working apparatus, the combination with a fixed die member and a movable die' member co-operating therewith, of a motor for moving the movable die member, including a cylinder and piston operating in the. cylinder and connected to the'movable die member through a piston rod, and a dcvicev independent of the motor and rod and interposed between thepiston and movable die member for movement therewith for delivering `cleansing fluid to the dies during the movement of the movable die member.

7. In a metal working apparatus, the combination with a cylinder having a head, of a pistonoperating in the cylinder, a fixed die, a movable die'connectedto the. piston through a rodand co-operating with the fixed die, and a stem'independent of the foregoing elements slidable in the cylinder head and having a passageway that opens into theV cylinder andi into the space between the dies, saidV stem leing movable with the piston and movable 8. In a metal working apparatus, the combination withV a cylinder member having an upper head and a piston operating in they cylinder member, of a xed die overlying the cylinder member, a movable die overlying the fixed die and connected throughV suitable elementsto the piston for movement towards andv from thefixed die, anda stem independentof the connectionsbetween the movable die and piston and slidably passing through the head and extending between the piston and movable die, said stem having a passageway l that opens into the cylinder member and into the space between the dies to direct fluid 'from the cylinder member through the head and against the dies for cleaning the same.

9. In a metal Working apparatus, the combination with a cylinder member having a piston chamber, of a piston operating in the chamber, co-acting die members, one of which isV fixed and the other movable, connections between the piston and the movable die for eil'ectin its movement during the movement of the piston, means for directing active fluid to the piston chamber to actuate the piston, and means separate from the piston and its connection with the die and movable therewith for directing a portion of the fluid from the piston chamber to the dies for cleansing them, said means being closed against operation when the ldies are ina predetermined relation.

10. In a metal working apparatus, the comlbination with a cylinder member having a piston chamber, of a piston operating in the chamber, cofacting die members, one of which is iXed while the other is movable, said movable die being connected to the piston through suitable rods to effect its'movement with the piston, means for directing motive iluid to the piston chamber to actuate the piston, and a device movable with the piston and independent of its connection with the movable die and having a passageway for permitting a portion of the Huid to escape from the piston `chamber to the dies for cleansing the latter, said passageway being closed when the dies are in certain predeterminedrelation.

11. In a metal working apparatus, the combination of a pair of co-acting die members, one of which is movable, of a Huid operated motor connected to the movable die member for moving the same, and means independent of the motor and the movable die and their connection, but movable by either, for conducting fluid from a source to the die member for cleaning the same.

In testimony whereof, I aix my signature.

GUSTAV C. PEARSON. 

